Abstract:
A high speed granule delivery system and method is disclosed for dispensing granules in intermittent patterns onto a moving asphalt coated strip in the manufacture of roofing shingles. The system includes a granule hopper and a rotationally indexable pocket wheel in the bottom of the hopper. A series of pockets are formed in the circumference of the wheel and the pockets are separated by raised lands. A seal on the bottom of the hopper seals against the raised lands as the wheel is indexed. In use, the pockets of the pocket wheel drive through and are filled with granules in the bottom of the hopper. As each pocket is indexed beyond the seal, it is exposed to the moving asphalt coated strip below and its granules fall onto the strip to be embedded in the hot tacky asphalt. The speed at which the wheel is indexed is coordinated with the speed of the asphalt coated strip so that granules and strip are moving at about the same forward speed or at a preselected ratio of speeds when the granules fall onto the strip. Well defined patterns of granules are possible at high production rates.
Abstract:
A system and method for coating a substrate, the system including integrated powder coating material preparation and deposition of powder coating material onto a substrate. The system includes a feed input that processes the powder coating materials for use in a filament extension atomizer. The filament extension atomizer stretches fluid filaments of the powder coating material to form droplets of powder coating material. The droplets of powder coating material are partially cooled to prevent agglomeration and to form a powder coating material suitable for electrostatic deposition. The cooled powder coating material is electrostatically charged and directed onto the substrate surface, where it is deposited due to the electrostatic potential between the substrate and cooled droplets. The deposited powder coating material is then cured to the substrate to form a cohesive film of coating material across the substrate.
Abstract:
Among other things, methods, systems and apparatus are described for implementing nanomotor-based micro- and nanofabrication. In one aspect, a method of fabricating nanoobjects comprises functionalizing a nanomotor with a reagent. The method also includes controlling a movement of the functionalized nanomotor in a solution containing material to react with the reagent to induce a localized deposition or precipitation of a product onto a surface of a substrate or etching of the substrate.
Abstract:
There is provided an electro-conductive belt including a resin material and conductive particles, the electro-conductive belt including: an innermost layer that contains none of the conductive particles; a first conductive layer that is adjacent to the innermost layer at an outer side thereof, a concentration of the conductive particles being highest in the first conductive layer; and a second conductive layer that is adjacent to the first conductive layer at an outer side thereof, the second conductive layer containing the conductive particles in a concentration lower than in the first conductive layer and higher than in the innermost layer.
Abstract:
The apparatus has a first container part within which material for distributing over a surface as a guide coat is held in a substantially loose, finely divided particulate form; a perforated element through which the particulate material can be sprinkled or shaken; and a second container part for receiving an applicator, e.g., in the form of a sponge, on which the particulate material is to be sprinkled or shaken. The apparatus may be provided with the applicator or as a replacement part or nullre-fillnull for existing apparatus. Particulate material may also be provided for re-charging such apparatus.
Abstract:
The invention concerns a powder-coating process and device, plus a coating powder for use in the process, the process calling for a suspension of the coating powder to be atomized and sprayed on to the surface to be coated, (1) the powder being suspended in a liquefied gas which is kept liquefied under a pressure of at the most 20 bar and (2) the liquid gas being allowed to vaporize before, during or after the suspension is atomized.